Deep Learning with TensorFlow by Giancarlo Zaccone & Md. Rezaul Karim & Ahmed Menshawy
Author:Giancarlo Zaccone & Md. Rezaul Karim & Ahmed Menshawy [Zaccone, Giancarlo]
Language: eng
Format: azw3
Publisher: Packt Publishing
Published: 2017-04-24T04:00:00+00:00
def loss(pred, label):
cross_entropy_loss = tf.reduce_mean(tf.nn.softmax_cross_entropy_with_logits(logits=pred, labels=label))
tf.summary.scalar('Entropy', cross_entropy_loss) reg_losses = tf.add_n(tf.get_collection("losses"))
tf.scalar_summary('Reg_loss', reg_losses)
return cross_entropy_loss + REGULARIZATION * reg_losses
def train(loss, step):
return tf.train.AdamOptimizer(LEARNING_RATE).
minimize(loss, global_step=step)
def get_next_batch(images, labels, step):
offset = (step * BATCH_SIZE) % (images.shape[0] - BATCH_SIZE)
batch_images = images[offset: offset + BATCH_SIZE]
batch_labels = labels[offset:offset + BATCH_SIZE]
return batch_images, batch_labels
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